Online registration is open now at OneStopRace.com. Fees: $35, adults; $30, Greenbelt Conservancy members; $20, students under 18; $40, race day registration for all ages.

The route begins on the rolling fairways by the federal-style David LaTourette House and takes runners into the surrounding Greenbelt trails — rustic and hilly.

“Due to elevations, parts of this course are challenging, making that feeling of crossing the finish line even more rewarding,” says Dorothy Reilly, director of public relations for the Greenbelt Conservancy. “This race will be professionally timed culminating in an awards ceremony.”

Note: This run steps off in all weather conditions (don’t worry, Reilly assures us “no one got frostbite last year”). The Grille Room Bar will be open post race to serve those over 21. Visit SIGreenbelt.org for more information. ---Follow @siadvance on Twitter